the treatment measures for the large numerical jump of the carbon dioxide tester:

1, the short-time zero shaking scale is less than 1% of the maximum range and belongs to the normal scale, in the absence of measured gas, long-term drift of less than 2% of the maximum range is attributed to the normal scale. If it exceeds this scale, it is required to admit whether there is measured gas on site, or the temperature and humidity in the air shake greatly, resulting in unstable value.

2. admit whether the zero calibration or target point calibration operation has been carried out on the carbon dioxide tester. if the zero calibration operation is carried out in the case of the measured gas, the low concentration gas may not be detected. if the target point calibration is carried out in the case of the measured gas, however, the calibrated concentration value does not match the practical concentration value, which may result in a large fluctuation in the value of the carbon dioxide tester or a small value detected. These two conditions can be handled by restoring the factory operation.

3. if the problem cannot be solved, it is required to admit whether the carbon dioxide tester has been fed with high-concentration gas or whether high-concentration gas has impacted the gas sensor. if the gas sensor has been impacted, the carbon dioxide tester will be turned on and aged for 24 hours, if the value is not stable, it may be that the gas sensor is damaged by impact and needs to be replaced.